I have done zero scheduled maintenance. Back when I ordered, on Tesla's site was a remark about how much you'd save because you wouldn't have to pay for oil changes, etc. One scheduled service with Tesla cost more than ten oil changes. (Not required to maintain original warranty.)
I recall there was no documentation regarding exactly what the maintenance covered, but that it included brake pads (fat chance), washer fluid, maybe wiper blades. I'll have you know I'm pretty handy with a bottle of washer fluid.
What about the drive unit fluid change? That seems like something that would be important to do. Any issues with the drive unit thus far?